Check-valve for water-filters



(No Model.)

A. J. WEST.

UHEGK VAL-VE EOE WATER FILTERS.

No.,442,158. S Patented Deo. 9, 1890.

QQMWW M14/f- M/ @MW UNTTED STATES PATENT jOEEIcE.

ADONIRAM JI'DISOBv \VEST, OF CHICAGO, ILLINOIS.

CHECK-VALVE FOR WATER-FiLTERS.

SPECIFICATION forming part of Letters Patent No. 442,158, dated December 9, 1890.

Application tiled June 27, 1890.

To @ZZ whom t may concern.-

Be it known that I, ADONIRAM JUDsoN I EST, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Check-Valves for Tater- Filters; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in check-valves intended for use in connection with the cleansing attachment to waterfilters; and it consists in a cap affording egress to the fluid and detiecting it in such a manner as to insure the thorough cleansing of the entire mass of filtering material.

In the accompanying drawings, Figure l shows a vertical section of a portion of a iilter, exhibiting the location of the check-valve. Fig. 2 is a plan section of the same; Fig. 3, an elevation of my improved valve; Fig. 4, a vertical central section of the same; and Fig. 5, a section on the line 5 5, Fig. 4.

In the drawings, A represents the filtertank; B, the discharge-pipe for carrying off purified water; C, the service pipe of the cleansing attachment; c e, radiating-pipes extending from the pipe C to the sides of the tank A and adjacent to its bot-tom; D D, the check-valves attached to the pipes c c and affording means of escape for the water into the ilt-ering material surrounding them.

In the filtering of water it is the practice to use a ne sand or silt for a tiltering material, the water passing down through it and being discharged through the pipes B and similar pipes located in other portions ot' the tank. (Not shown.) The impurities in the water accumulate in this sand, usually being coagulated by a chemical introduced in the water, and itbecom es necessary to cleanse the filter by frequently reversing the iow of the water, so as to carry the ilth up through the sand and allow it to run off. This can be thoroughly done only by forcing the water through all portions of the mass of filtering material, and for this reason a cleansing at- Serial No. 356,960. (No model.)

tachment, as shown by the pipes C c c, becomes essential. Check-valves must cover the vents of the radiatingpipes c c to prevent water and sand from being forced into them when the ilter is in use. This general form of construction is common, but as heretofore made it has failed to cleanse all of the filtering material, because of necessity the valve is located on the top ot' the pipes c c and hence several inches above the bottoni of the tank, while no means have been devised of forcing the water down through the sand lying' below the valve.

My improved valve consists of the body d, which is tubular in form, one end being connected with the pipe cv and the other being open, the cap d', seated upon the open end of the body, and the ball d2, resting in a coneshaped seat in the lower end of the body of the valve. The extreme diameter of the cap d is greater than that of the body d. The periphery of the cap is serrated and the points extend downwardly, so that the water is in part deliected in a downward direction. The remainder of the water, in passing through the interstices, is scattered in various directions. This form of detiector affords no lodgment for particles of sand.

For the purpose of facilitating the free discharge of the waterthe upper edge of the walls of the body (l is beveled both internally and externally, the cap d being shaped so as to seat itself upon the internal bevel. This construction also avoids a flat or horizontal valve-seat, which would serve as a lodgment for sand and thus prevent the valve from serving its proper purpose. Iings e extend downwardly from the cap d', radiating from the center, so as to bear against the inner surface of the walls d, for the purpose of guiding the cap. An aperture e is formed transversely through the line of juncture of these wings, which, as shown, are four in number. Through this aperture passes a pin f, driven through 'suitable apertures in the walls d, for the purpose of preventing the cap from bei ing displaced. The aperture e' is of greater diameter than the pin f, so as to allow the cap some vertical play.

The ball d2 is a supplementary device to stop any sand which may possibly work under the cap d. The wings e serve as a re- ICO taining-stop for this ball when forced upwardly by a current of water. One or more bosses, as shown at g, may be cast upon the exterior'of the body D to facilitate the screwing of the valve info the pipe o.

l claim as my invention- In a check-valve for Water-filters, a tubular body having one of its ends open and the edges of' its Walls beveled internally and externally, in combination with a closing cap of greater diameter Ichan the body and having its edges serrated and deflected toward the body, and having its seat conforming to the beveled edges of the body walls, guide- Wings extending from the cap Within the body, and a pin f, fixed in the walls of the body and passing through an aperture in the wings of greater' diameter than itself', all substantially as described, and for the purpose set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

ADONIRAM JUDSON VEST. \Vitnesses:

CYRUS OAKEs, i J. A. BOMMHARDT. 

